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Water Supply, Zap, North Dakota. NPDES permit ND0026387, in force until Mar 31, 2031. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Conductivity | daily minimum | report only (umho/cm) | all year |
| Conductivity | monthly average | report only (umho/cm) | all year |
| Conductivity | daily maximum | report only (umho/cm) | all year |
| Oxygen, dissolved [DO] | daily minimum | ≥ 5 mg/L | all year |
| Oxygen, dissolved [DO] | monthly average | report only (mg/L) | all year |
| Oxygen, dissolved [DO] | daily maximum | report only (mg/L) | all year |
| BOD, 5-day, 20 deg. C | daily minimum | report only (mg/L) | all year |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | all year |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 45 mg/L | all year |
| pH | minimum | ≥ 6.5 SU | all year |
| pH | maximum | ≤ 9 SU | all year |
| Alkalinity, total [as CaCO3] | daily minimum | report only (mg/L) | all year |
| Alkalinity, total [as CaCO3] | annual average | report only (mg/L) | all year |
| Alkalinity, total [as CaCO3] | daily maximum | report only (mg/L) | all year |
| Bicarbonate ion- [as HCO3] | daily minimum | report only (mg/L) | all year |
| Bicarbonate ion- [as HCO3] | annual average | report only (mg/L) | all year |
| Bicarbonate ion- [as HCO3] | daily maximum | report only (mg/L) | all year |
| Carbonate ion- [as CO3] | daily minimum | report only (mg/L) | all year |
| Carbonate ion- [as CO3] | annual average | report only (mg/L) | all year |
| Carbonate ion- [as CO3] | daily maximum | report only (mg/L) | all year |
| Solids, total suspended | daily minimum | report only (mg/L) | all year |
| Solids, total suspended | quarterly average | report only (mg/L) | all year |
| Solids, total suspended | daily maximum | report only (mg/L) | all year |
| Nitrite + Nitrate total [as N] | daily minimum | report only (mg/L) | all year |
| Nitrite + Nitrate total [as N] | annual average | report only (mg/L) | all year |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year |
| Phosphorus, total [as P] | daily minimum | report only (mg/L) | all year |
| Phosphorus, total [as P] | annual average | report only (mg/L) | all year |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year |
| Hardness, total [as CaCO3] | daily minimum | report only (mg/L) | all year |
| Hardness, total [as CaCO3] | annual average | report only (mg/L) | all year |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year |
| Hardness, total [as CaCO3] | daily minimum | report only (mg/L) | all year |
| Hardness, total [as CaCO3] | annual average | report only (mg/L) | all year |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year |
| Calcium, total [as Ca] | daily minimum | report only (mg/L) | all year |
| Calcium, total [as Ca] | annual average | report only (mg/L) | all year |
| Calcium, total [as Ca] | daily maximum | report only (mg/L) | all year |
| Magnesium, total [as Mg] | daily minimum | report only (mg/L) | all year |
| Magnesium, total [as Mg] | annual average | report only (mg/L) | all year |
| Magnesium, total [as Mg] | daily maximum | report only (mg/L) | all year |
| Sodium, total [as Na] | daily minimum | report only (mg/L) | all year |
| Sodium, total [as Na] | annual average | report only (mg/L) | all year |
| Sodium, total [as Na] | daily maximum | report only (mg/L) | all year |
| Sodium adsorption ratio | daily minimum | report only (Ratio) | all year |
| Sodium adsorption ratio | annual average | report only (Ratio) | all year |
| Sodium adsorption ratio | daily maximum | report only (Ratio) | all year |
| Sodium, % | daily minimum | report only (%) | all year |
| Sodium, % | annual average | report only (%) | all year |
| Sodium, % | daily maximum | report only (%) | all year |
| Potassium, total [as K] | daily minimum | report only (mg/L) | all year |
| Potassium, total [as K] | annual average | report only (mg/L) | all year |
| Potassium, total [as K] | daily maximum | report only (mg/L) | all year |
| Chloride [as Cl] | daily minimum | report only (mg/L) | all year |
| Chloride [as Cl] | monthly average | report only (mg/L) | all year |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year |
| Sulfate, total [as SO4] | daily minimum | report only (mg/L) | all year |
| Sulfate, total [as SO4] | monthly average | report only (mg/L) | all year |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year |
| Fluoride, total [as F] | daily minimum | report only (mg/L) | all year |
| Fluoride, total [as F] | quarterly average | report only (mg/L) | all year |
| Fluoride, total [as F] | daily maximum | report only (mg/L) | all year |
| Silica, total [as SiO2] | daily minimum | report only (mg/L) | all year |
| Silica, total [as SiO2] | annual average | report only (mg/L) | all year |
| Silica, total [as SiO2] | daily maximum | report only (mg/L) | all year |
| Arsenic, total [as As] | daily minimum | report only (mg/L) | all year |
| Arsenic, total [as As] | annual average | report only (mg/L) | all year |
| Arsenic, total [as As] | daily maximum | report only (mg/L) | all year |
| Cadmium, total [as Cd] | daily minimum | report only (mg/L) | all year |
| Cadmium, total [as Cd] | annual average | report only (mg/L) | all year |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | all year |
| Copper, total [as Cu] | daily minimum | report only (mg/L) | all year |
| Copper, total [as Cu] | annual average | report only (mg/L) | all year |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year |
| Iron, total [as Fe] | daily minimum | report only (mg/L) | all year |
| Iron, total [as Fe] | annual average | report only (mg/L) | all year |
| Iron, total [as Fe] | daily maximum | report only (mg/L) | all year |
| Lead, total [as Pb] | daily minimum | report only (mg/L) | all year |
| Lead, total [as Pb] | annual average | report only (mg/L) | all year |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year |
| Manganese, total [as Mn] | daily minimum | report only (mg/L) | all year |
| Manganese, total [as Mn] | annual average | report only (mg/L) | all year |
| Manganese, total [as Mn] | daily maximum | report only (mg/L) | all year |
| Nickel, total [as Ni] | daily minimum | report only (mg/L) | all year |
| Nickel, total [as Ni] | annual average | report only (mg/L) | all year |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | all year |
| Zinc, total [as Zn] | daily minimum | report only (mg/L) | all year |
| Zinc, total [as Zn] | annual average | report only (mg/L) | all year |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year |
| Selenium, total [as Se] | daily minimum | report only (mg/L) | all year |
| Selenium, total [as Se] | annual average | report only (mg/L) | all year |
| Selenium, total [as Se] | daily maximum | report only (mg/L) | all year |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year |
| Chlorine, total residual | daily minimum | report only (mg/L) | all year |
| Chlorine, total residual | monthly average | report only (mg/L) | all year |
| Chlorine, total residual | daily maximum | report only (mg/L) | all year |
| Flow, total | monthly total | report only (Mgal) | all year |
| Hydroxide | daily minimum | report only (mg/L) | all year |
| Hydroxide | annual average | report only (mg/L) | all year |
| Hydroxide | daily maximum | report only (mg/L) | all year |
| Solids, total dissolved [TDS] | daily minimum | report only (mg/L) | all year |
| Solids, total dissolved [TDS] | annual average | report only (mg/L) | all year |
| Solids, total dissolved [TDS] | daily maximum | report only (mg/L) | all year |
| Duration of discharge | quarterly total | report only (d) | all year |
| Turbidity, lab, NTU | daily minimum | report only (NTU) | all year |
| Turbidity, lab, NTU | annual average | report only (NTU) | all year |
| Turbidity, lab, NTU | daily maximum | report only (NTU) | all year |
Cited limits by parameter: North Dakota's rules and the federal ones.
Same industry: the 8 Water Supply permits in North Dakota.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/ND0026387 · MCP: https://passage-data.com/mcp